WO2021009390A1 - Arrangement of blockchains with restricted transaction - Google Patents

Arrangement of blockchains with restricted transaction Download PDF

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Publication number
WO2021009390A1
WO2021009390A1 PCT/ES2019/070503 ES2019070503W WO2021009390A1 WO 2021009390 A1 WO2021009390 A1 WO 2021009390A1 ES 2019070503 W ES2019070503 W ES 2019070503W WO 2021009390 A1 WO2021009390 A1 WO 2021009390A1
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Prior art keywords
transaction
nodes
restricted
node
information transaction
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PCT/ES2019/070503
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Spanish (es)
French (fr)
Inventor
Alberto Miguel HERNANDEZ ACOSTA
Rubén NIETO MARTÍN-VARÉS
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Allfunds Bank, S.A.U
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Publication date
Application filed by Allfunds Bank, S.A.U filed Critical Allfunds Bank, S.A.U
Priority to BR112020025811-3A priority Critical patent/BR112020025811A2/en
Priority to MX2020014099A priority patent/MX2020014099A/en
Priority to US17/253,237 priority patent/US20210166222A1/en
Priority to JP2020571719A priority patent/JP7410060B2/en
Priority to CA3103884A priority patent/CA3103884A1/en
Priority to CN201980040839.9A priority patent/CN112654972A/en
Priority to PCT/ES2019/070503 priority patent/WO2021009390A1/en
Priority to SG11202012781YA priority patent/SG11202012781YA/en
Priority to EP19932269.4A priority patent/EP4036744B1/en
Priority to IL279523A priority patent/IL279523B1/en
Priority to ZA2020/07897A priority patent/ZA202007897B/en
Publication of WO2021009390A1 publication Critical patent/WO2021009390A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/36—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
    • G06Q20/367—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes involving electronic purses or money safes
    • G06Q20/3678—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes involving electronic purses or money safes e-cash details, e.g. blinded, divisible or detecting double spending
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/02—Payment architectures, schemes or protocols involving a neutral party, e.g. certification authority, notary or trusted third party [TTP]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/04—Payment circuits
    • G06Q20/06—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
    • G06Q20/065—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash
    • G06Q20/0658—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash e-cash managed locally
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/383—Anonymous user system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/389—Keeping log of transactions for guaranteeing non-repudiation of a transaction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
    • H04L9/3239—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H04L9/3255—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures using group based signatures, e.g. ring or threshold signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

Definitions

  • a participating node or blockchain node of the blockchain network refers to a natural or legal person that maintains, shares and operates with its own local copy of the blockchain; namely, ledger or ledger.
  • the telecommunications network 14 may be a network such as a local area network, LAN, wired or wireless, wide area network, WAN, such as an intranet, an extranet or the Internet; or similar.
  • the telecommunications network 14 facilitates the communications between the nodes 12, 13 of the chain block network 11.
  • the message requesting the execution of the restricted transaction includes, in addition to the data of the proposed transaction, the metadata relating to the privacy context for which the restricted transaction is executed.
  • the encrypted and marked data block of the block chain will be distributed by the validating nodes 13 of the block chain network and will comprise from 0 to N transactions and at least one information transaction t x '; namely, a block of data encrypted and marked as restricted. Participating nodes 12 in the privacy group of t x are further informed that t x is a transaction destined for that privacy group.

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Theoretical Computer Science (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Storage Device Security (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

An arrangement of blockchains configured to distribute simultaneously at least one public transaction and/or one restricted transaction, where the arrangement includes a plurality of participant nodes (12) and a plurality of validator nodes (13) connected via a telecommunications network (14); where a proponent participant node (12) is configured to send to all the validator nodes (13) the content of a tx information transaction register, together with the identifier of a certain preset privacy group; to provide the blockchain system which distributes information transaction register blocks with anonymity and privacy capabilities; in such a way that at least one receiving participant node (12) connected to a blockchain network (11) is capable of deciphering, reading and executing the information transaction register blocks encrypted by the validator or mining nodes (13) of the blockchain network (11).

Description

DISPOSICIÓN DE CADENAS DE BLOQUES CON UNA TRANSACCIÓN RESTRINGIDA Objeto ARRANGEMENT OF CHAINS OF BLOCKS WITH A RESTRICTED TRANSACTION Purpose
La presente invención se refiere a la transferencia o transacción de información y, más específicamente, a un proveedor de una solución blockchain; a saber, red de bloques en cadena distribuida que valida y distribuye bloques de registros de transacciones de información que pueden estar encriptadas, de manera que, al menos un miembro destinatario, conectado a la red de bloques en cadena, es capaz de descifrar, leer y ejecutar los bloques de registro de transacciones de información encriptados por ios nodos vaiidadores o mineros de la red de bloques en cadena. The present invention relates to the transfer or transaction of information and, more specifically, to a provider of a blockchain solution; namely, distributed chain block network that validates and distributes blocks of information transaction records that can be encrypted, so that at least one recipient member, connected to the chain block network, is able to decrypt, read and execute the information transaction log blocks encrypted by the validator or miner nodes of the chain block network.
Estado de la técnica State of the art
Dentro de cualquier industria, existen numerosas redes privadas construidas alrededor de servicios y o activos de servicios específicos. Una red privada construida alrededor de un activo financiero puede incluir una pluralidad de miembros de la red tal como un proveedor de servicios; por ejemplo, bancos, agencias de compensación o similar; instituciones reguladoras, clientes, etc. que solicitan la transferencia de un activo financiero. Within any industry, there are numerous private networks built around specific services and or service assets. A private network built around a financial asset can include a plurality of network members such as a service provider; for example, banks, clearing agencies or similar; regulatory institutions, clients, etc. requesting the transfer of a financial asset.
Una de las principales preocupaciones de las redes privadas, y de cualquier red en general, es garantizar que el contenido de las transacciones que ejecutan sus sistemas, únicamente sean reveladas a los participantes de las transacciones. One of the main concerns of private networks, and of any network in general, is to ensure that the content of the transactions carried out by their systems are only revealed to the participants in the transactions.
Por ejemplo, un proveedor de servicios que procesa una transferencia de información de un activo financiero de un primer cliente no revelaría el contenido de esa transferencia de información a clientes no autorizados que no están involucrados en la transferencia. For example, a service provider that processes an information transfer of a financial asset from a first customer would not disclose the content of that information transfer to unauthorized customers who are not involved in the transfer.
Aunque el proveedor de servicios desarrolle un sistema propio para que los demás actores interactúen con su sistema, el resto de los integrantes de la red también desarrollan sus propios sistemas para que sea posible la integración con el proveedor de servicios. Este escenario conlleva intrínsecamente la convivencia de numerosos sistemas creados con tecnologías diferentes e interconectados además con diferentes protocolos. Esta diversidad de sistemas conduce a varios problemas de difícil solución: Although the service provider develops its own system for the other actors to interact with its system, the rest of the network members also develop their own systems so that integration with the service provider is possible. This scenario intrinsically involves the coexistence of numerous systems created with different technologies and also interconnected with different protocols. This diversity of systems leads to several problems that are difficult to solve:
Primero, cada sistema individual es intrínsecamente diferente a otro sistema individual ya sea por la tecnología utilizada para su desarrollo, así como las adaptaciones propias de cada participante. Además de requerir una inversión significativa y particularizada de cada uno de ios participantes para integrar y transmitir la información entre los sistemas de forma adecuada. Segundo, cada sistema individual puede diferir en el nivel de seguridad Implementada Por ejemplo, cada red puede proporcionar diferentes protocolos para el cifrado, la autenticación, el enmascaramiento de datos y similares. Por lo tanto, algunos sistemas pueden ser más susceptibles de verse comprometidos, afectando tanto al sistema comprometido como a los datos que el resto de los sistemas hayan compartido con este.First, each individual system is intrinsically different from another individual system, either because of the technology used for its development, as well as the individual adaptations of each participant. In addition to requiring a significant and particular investment from each of the participants to integrate and transmit the information between the systems in an appropriate way. Second, each individual system may differ in the level of security implemented. For example, each network may provide different protocols for encryption, authentication, data masking, and the like. Therefore, some systems may be more susceptible to being compromised, affecting both the compromised system and the data that the rest of the systems have shared with it.
En tercer lugar, la diferente naturaleza de cada sistema implica que los datos se almacenan de forma no estandarizada. Esto hace que se deban producir repetitivas conciliaciones de datos para verificar que los subconjuntos de datos compartidos entre los diferentes sistemas son equivalentes. Third, the different nature of each system means that data is stored in a non-standardized way. This requires repetitive data reconciliations to verify that subsets of data shared between different systems are equivalent.
Por último, en cuarto lugar, ante una eventual pérdida de información de uno de ios participantes la recuperación de la información será considerablemente costosa y requerirá de un tiempo considerable en la que el sistema afectado no estará disponible. Finally, in fourth place, in the event of an eventual loss of information from one of the participants, the recovery of the information will be considerably expensive and will require considerable time in which the affected system will not be available.
Sumario Summary
La presente invención busca resolver uno o más de los inconvenientes expuestos anteriormente mediante una disposición de cadena de bloques con al menos una transacción restringida tai como es definida en las reivindicaciones. The present invention seeks to solve one or more of the drawbacks set forth above by means of a blockchain arrangement with at least one restricted transaction as defined in the claims.
El sistema blockchain propuesto proporciona capacidades de anonimato y privacidad inexistentes actualmente en otros sistemas blockchain. Estas dos nuevas capacidades se desarrollan como elemento diferenciador en una única cadena de bloques, que es compartida por todos los nodos integrantes de una red de bloques en cadena. The proposed blockchain system provides anonymity and privacy capabilities currently lacking in other blockchain systems. These two new capabilities are developed as a differentiating element in a single chain of blocks, which is shared by all the nodes that make up a network of chain blocks.
La red de bloques en cadena comprende una pluralidad de nodos participantes y nodos validadores o mineros con un mecanismo de consenso de prueba de autoridad. The blockchain network comprises a plurality of participating nodes and validator or miner nodes with a proof of authority consensus mechanism.
El método proporciona, a la pluralidad de nodos validadores, la capacidad de transformar un bloque de registro de transacción de información propuesto para una transacción restringida desde un nodo participante proponente, en un bloque de registro de transacción de información restringido y anónimo, que es transmitido hacia la pluralidad de nodos participantes destinatarios o nodos blockchain de la red de bloques en cadena. The method provides, to the plurality of validator nodes, the ability to transform a proposed information transaction record block for a restricted transaction from a proposing participant node, into a restricted and anonymous information transaction record block, which is transmitted towards the plurality of recipient participating nodes or blockchain nodes of the blockchain network.
Los nodos validadores receptores están configurados para transmitir bloques con registros de transacciones de información encriptados hacia los nodos participantes destinatarios de la red de bloques en cadena. The receiving validator nodes are configured to transmit blocks with encrypted information transaction records to the recipient participating nodes of the blockchain network.
La transacción validada por el nodo validador receptor; a saber, nodo minero, se transmitirá desde el nodo validador receptor hacia todos los nodos participantes destinatarios de la red de bloques en cadena al Igual que lo haría un registro de transacción de información público; esto es, dentro de un bloque de la cadena de bloques. The transaction validated by the receiving validator node; namely, mining node, it will be transmitted from the receiving validator node to all the recipient participating nodes of the Blockchain network Just like a public information transaction record would; that is, within a block of the blockchain.
La transacción validada es encriptada por el nodo validador receptor para que los nodos participantes de la transacción sean ios únicos capaces de leerla y ejecutarla. The validated transaction is encrypted by the receiving validator node so that the nodes participating in the transaction are the only ones capable of reading and executing it.
Por lo tanto, la cadena de bloques estará formada por bloques que contendrán indistintamente registros de transacciones de información públicos y/o restringidos; a saber, privados. Therefore, the blockchain will be made up of blocks that will indistinctly contain records of public and / or restricted information transactions; namely, private.
Es importante resaltar que la solución sólo emplea una única cadena de bloques en la que coexisten ai menos dos tipos de registros de transacciones de información; esto es registros de transacciones de información públicos y/o registros de transacciones de información restringidos (privados y anónimos). It is important to highlight that the solution only uses a single chain of blocks in which at least two types of information transaction records coexist; this is public information transaction records and / or restricted (private and anonymous) information transaction records.
Un nodo validador está configurado para enchpíar los registros de transacciones de información propuestos desde ios nodos participantes proponentes; de manera que, el nodo validador proporciona registros de transacciones de información restringidos al final de la etapa de encriptado. A validator node is configured to embed the proposed information transaction records from the proposing participating nodes; thus, the validator node provides restricted information transaction records at the end of the encryption stage.
Los registros de transacciones de información encriptados sólo pueden ser descifrados y ejecutados por ios nodos participantes de la red de bloques en cadena, que estén en posesión de una clave de privacidad de encriptado correspondiente al grupo de privacidad dentro del que se realiza la transacción restringida propuesta. The encrypted information transaction records can only be decrypted and executed by the participating nodes of the blockchain network, which are in possession of an encryption privacy key corresponding to the privacy group within which the proposed restricted transaction is carried out. .
Se ha de entender por grupo de privacidad a un subconjunto de nodos de la red de bloques en cadena que comparten, al menos, una clave de privacidad de encriptado para leer las transacciones restringidas realizadas entre ios nodos del grupo de privacidad. Privacy group is to be understood as a subset of nodes of the chain block network that share at least one encryption privacy key to read the restricted transactions carried out between the nodes of the privacy group.
Un miembro de la red de bloques en cadena puede formar parte de ai menos un grupo de privacidad y, como máximo, puede pertenecer a tantos grupos de privacidad como combinaciones de miembros diferentes comprenda la red de bloques en cadena. A member of the blockchain network can be part of at least one privacy group and, at most, can belong to as many privacy groups as combinations of different members comprise the blockchain network.
Un nodo participante o nodo blockchain de la red de bloques en cadena, se refiere a una persona física o jurídica que mantiene, comparte y opera con su propia copia local de la cadena de bloques; a saber, libro de registros o ledger. A participating node or blockchain node of the blockchain network, refers to a natural or legal person that maintains, shares and operates with its own local copy of the blockchain; namely, ledger or ledger.
Además, un miembro se refiere a una persona física o jurídica que realiza transacciones de información y está autorizada para acceder a determinados registros de transacciones de información de la cadena de bloques. Los nodos participantes contendrán una pluralidad de claves de privacidad de encriptado destinado a realizar registros de transacciones de información restringidas dentro de los grupos de privacidad en los que estén incluidos. In addition, a member refers to a natural or legal person who performs information transactions and is authorized to access certain information transaction records on the blockchain. The participating nodes will contain a plurality of encryption privacy keys destined to carry out records of transactions of restricted information within the privacy groups in which they are included.
El nodo validador encripta un registro de transacción de información propuesto desde el nodo participante proponente con la clave de privacidad de encriptado de un determinado grupo de privacidad y, adicionaimente, marca el bloque de datos de registro de transacción encriptado como restringido y, seguidamente, el bloque creado, que comprende un registro de transacción de información encriptado, es ensamblado en la cadena de bloques para la posterior distribución desde ios nodos validadores hacia el resto de nodos integrantes de la red de bloques en cadena. The validator node encrypts a proposed information transaction record from the proposing participant node with the encryption privacy key of a certain privacy group and, additionally, marks the encrypted transaction record data block as restricted and, then, the The created block, which comprises an encrypted information transaction record, is assembled in the block chain for subsequent distribution from the validator nodes to the rest of the nodes of the block chain network.
Por lo tanto, cualquier miembro del grupo de privacidad conectado a la red de bloques en cadena puede acceder a los detalles de determinadas transacciones de información incluidas en el nuevo bloque creado. Therefore, any member of the privacy group connected to the blockchain network can access the details of certain information transactions included in the newly created block.
El nodo participante destinatario descifra los registros de transacciones de información restringidas del bloque creado utilizando la correspondiente clave de privacidad de encriptado de entre su conjunto de claves de privacidad de encriptado asignada a cada grupo de privacidad. The recipient participating node decrypts the restricted information transaction records of the created block using the corresponding encryption privacy key from among its set of encryption privacy keys assigned to each privacy group.
Por lo tanto, el sistema proporciona registros de transacciones restringidas o privadas y públicas contenidas en un bloque y que finalmente son ensambladas en la cadena de bloques y distribuidas uniformemente a todos ios miembros de la red, proporcionando no solo privacidad a las transacciones por la encriptación, sino anonimato porque ios bloques son distribuidos sólo por los nodos validadores. Therefore, the system provides records of restricted or private and public transactions contained in a block and that are finally assembled in the chain of blocks and distributed uniformly to all the members of the network, providing not only privacy to transactions through encryption , but anonymity because the blocks are distributed only by the validator nodes.
Todos los miembros de la red de la cadena de bloques utilizan una única cadena o ledger y, por lo tanto, se eliminan los recursos redundantes para administrar sistemas individuales. All members of the blockchain network use a single chain or ledger, thus eliminating redundant resources to manage individual systems.
La privacidad se logra a través del encriptado ya que los miembros de la red de cadenas de bloques solo pueden acceder a los detalles de las transacciones de información a las que tienen derecho; es decir, son miembros de una porción de nodos o grupo de privacidad de la red de cadenas de bloques. Privacy is achieved through encryption as members of the blockchain network can only access the details of the information transactions to which they are entitled; that is, they are members of a node portion or privacy group of the blockchain network.
El empleo de algoritmos de resumen de información establecen, además, la inmutabilidad de los registros de transacciones, protegiendo así contra posibles actos maliciosos. La resistencia de los datos se mejora a medida que los registros de transacciones cifrados son almacenados localmente por los miembros. The use of information summary algorithms also establish the immutability of the transaction records, thus protecting against possible malicious acts. Data resilience is improved as encrypted transaction logs are stored locally by members.
Breve descripción de las figuras Una explicación más detallada se da en la descripción que sigue y que se basa en la figura adjunta: Brief description of the figures A more detailed explanation is given in the description that follows and is based on the attached figure:
la figura 1 muestra en un diagrama de bloques una red de bloques en cadena que comprende una pluralidad de nodos que están conectados a través de una red de telecomunicaciones para difundir o propagar simultáneamente registros de transacción de información públicos y privados de una cadena de bloques. Figure 1 shows in a block diagram a blockchain network comprising a plurality of nodes that are connected through a telecommunications network to simultaneously broadcast or propagate public and private information transaction records of a blockchain.
Descripción Description
En relación con la figura 1 donde se muestra esquemáticamente un entorno de una red de bloques en cadena 1 1 donde una pluralidad de nodos, participantes 12 y validadores o mineros 13, están conectados a través de una red de telecomunicaciones 14 para compartir y ejecutar transacciones distribuidas dentro de bloques de datos que se agregan a una cadena de bloques o blockcbain. In relation to figure 1 where an environment of a chain block network 1 1 is shown schematically where a plurality of nodes, participants 12 and validators or miners 13, are connected through a telecommunications network 14 to share and execute transactions distributed within blocks of data that are added to a chain of blocks or blockcbain.
La cadena de bloques es distribuida a través de la red de telecomunicaciones 14 desde un nodo validador 13 hacia el resto de los nodos 12, 13 de la red de bloques en cadena 1 1. The blockchain is distributed through the telecommunications network 14 from a validator node 13 to the rest of the nodes 12, 13 of the blockchain network 1 1.
La red de telecomunicaciones 14 puede ser una red del tipo red de área local, LAN, cableada o inalámbrica, red de área amplia, WAN, tal como una intranet, una extranet o internet; o similar. La red de telecomunicaciones 14 facilita las comunicaciones entre los nodos 12, 13 de la red de bloques en cadena 11. The telecommunications network 14 may be a network such as a local area network, LAN, wired or wireless, wide area network, WAN, such as an intranet, an extranet or the Internet; or similar. The telecommunications network 14 facilitates the communications between the nodes 12, 13 of the chain block network 11.
Los nodos 12, 13 de la red de bloques en cadena 1 1 son dispositivos electrónicos del tipo un ordenador que ejecuta un sistema operativo. The nodes 12, 13 of the chain block network 1 1 are electronic devices of the type a computer running an operating system.
Los nodos 12, 13 que integran la red de bloques en cadena 1 1 están configurados para ejecutar instrucciones almacenadas en un medio de almacenamiento legible por ordenador. Asimismo, todos los nodos 12, 13 ejecutan protocolos de comunicación para interactuar con los servicios y/o el contenido proporcionado por la red de bloques en cadena 11. The nodes 12, 13 that make up the blockchain network 1 1 are configured to execute instructions stored on a computer-readable storage medium. Likewise, all nodes 12, 13 execute communication protocols to interact with the services and / or content provided by the chain block network 11.
Todos los nodos 12, 13 de la red de bloques en cadena 1 1 tienen acceso de lectura a los datos de la cadena en su propia copia local. Sólo los nodos validadores o mineros 13 pueden emitir o crear nuevos bloques con registros de transacciones públicas y restringidas. All nodes 12, 13 of the chain block network 1 1 have read access to the chain data in their own local copy. Only validator nodes or miners 13 can issue or create new blocks with public and restricted transaction records.
Una transacción pública y/o restringida; a saber, privada se transmite desde un nodo validador 13 hacia otros nodos validadores para validación y consenso. Una vez que la transacción es validada y consensuada, el nodo validador genera un bloque de datos para agregar a ¡a cadena de bloques. Cada bloque de datos incluye un bash relativo al bloque de datos inmediatamente anterior para así evitar la modificación de la información previa.A public and / or restricted transaction; namely, private is transmitted from a validator node 13 to other validator nodes for validation and consensus. Once the transaction is validated and consensual, the validator node generates a data block to add to blockchain. Each data block includes a bash relative to the immediately preceding data block to avoid modifying the previous information.
Sin embargo, si un nodo participante 12 propone una transacción privada o restringida, la transacción propuesta tiene que ser validada por la mayoría de ios nodos validadores o mineros 13. Esta transacción se transmite a los nodos validadores o mineros 13 mediante una red de telecomunicaciones 14. However, if a participating node 12 proposes a private or restricted transaction, the proposed transaction has to be validated by the majority of the validator or miner nodes 13. This transaction is transmitted to the validator or miner nodes 13 through a telecommunications network 14 .
El nodo validador 13 receptor del mensaje de solicitud de ejecución de transacción restringida determina los nodos participantes 12 en función de los integrantes introducidos en un determinado grupo de privacidad preconfigurado. The validator node 13 that receives the message requesting the execution of a restricted transaction determines the participating nodes 12 based on the members entered in a certain pre-configured privacy group.
El mensaje de solicitud de ejecución de la transacción restringida comprende además de los datos propios de la transacción propuesta los mefadatos relativos ai contexto de privacidad para el que se ejecuta la transacción restringida. The message requesting the execution of the restricted transaction includes, in addition to the data of the proposed transaction, the metadata relating to the privacy context for which the restricted transaction is executed.
La transacción restringida propuesta es transmisible desde el nodo validador 13 receptor a al menos uno o más nodos validadores 13 para su validación y consenso. Cada nodo validador 13 determina si una transacción es válida y si consensúa con el resto de nodos validadores 13 si debe integrarse en siguiente bloque de la cadena. The proposed restricted transaction is transferable from the receiving validator node 13 to at least one or more validator nodes 13 for validation and consensus. Each validator node 13 determines if a transaction is valid and if it agrees with the rest of the validator nodes 13 if it should be integrated into the next block in the chain.
Por lo tanto, la red 11 de nodos participantes 12 y validadores 13 mantienen y gestionan la cadena de bloques de datos compuestos simultáneamente por transacciones públicas y/o restringidas; de manera que, cada nodo 12, 13 tiene acceso a la totalidad de bloques de datos, ya sean registro de transacciones de información públicas o restringidas, aunque sólo los nodos participantes 12 del determinado grupo de privacidad tienen acceso simultáneo a ¡a transacción restringida y a transacciones públicas. Therefore, the network 11 of participating nodes 12 and validators 13 maintain and manage the chain of data blocks simultaneously composed of public and / or restricted transactions; so that each node 12, 13 has access to all data blocks, whether they are public or restricted information transaction records, although only the participating nodes 12 of a given privacy group have simultaneous access to the restricted transaction and public transactions.
Una transacción propuesta por un nodo participante 12 de la red de bloques en cadena tiene un identificador único que corresponde con la ejecución de una función matemática de resumen como MD5, un algoritmo de algoritmo hash seguro, SHA, BLAKE u otras funciones bash similares sobre su contenido binario. A este identificador único se le denominará hash de la transacción. A transaction proposed by a participating node 12 of the blockchain network has a unique identifier that corresponds to the execution of a summary mathematical function such as MD5, a secure hashing algorithm, SHA, BLAKE, or other similar bash functions on its binary content. This unique identifier will be called the hash of the transaction.
Para el inicio de la emisión de una transacción de información restringida, el nodo participante 12 proponente envía a todos ios nodos validadores 13 el contenido del registro de transacción de información tx, junto con el identificador del grupo de privacidad. For the initiation of the issuance of a restricted information transaction, the proposing participant node 12 sends to all the validator nodes 13 the content of the information transaction record t x , together with the identifier of the privacy group.
Los nodos validadores 13 ejecutan la transacción de información y, una vez, que la transacción de información ha sido validada y consensuada por una mayoría de nodos validadores 13, el registro de transacción de información tx es encriptado por un módulo encriptador del nodo validador 13. La transacción de información tx encriptada es recubierta por una nueva transacción de información tx’; de manera que, la transacción de información tx’ es forzada a mantener el mismo identificador hash que la transacción de información tx. De esta forma, ei bloque de datos encriptado es marcado como una transacción de información tx restringida para la que sólo los nodos participantes 12 que poseen la clave de privacidad de encriptado son capaces de leer y ejecutar la transacción de información tx restringida. The validator nodes 13 execute the information transaction and, once the information transaction has been validated and agreed by a majority of validator nodes 13, the information transaction record t x is encrypted by an encryption module of the validator node 13 . The encrypted information transaction t x is covered by a new information transaction t x '; so that the information transaction t x 'is forced to keep the same hash identifier as the information transaction t x . In this way, the encrypted data block is marked as a restricted information transaction t x for which only the participating nodes 12 that possess the encryption privacy key are able to read and execute the restricted information transaction t x .
El bloque de datos encriptado y marcado de la cadena de bloques será distribuido por los nodos validadores 13 de la red de bloques en cadena y comprenderá de 0 a N transacciones y, al menos, una transacción de información tx’; a saber, un bloque de datos encriptado y marcado como restringido. A los nodos participantes 12 en el grupo de privacidad de tx, se les informa además que tx es una transacción destinada a ese grupo de privacidad. The encrypted and marked data block of the block chain will be distributed by the validating nodes 13 of the block chain network and will comprise from 0 to N transactions and at least one information transaction t x '; namely, a block of data encrypted and marked as restricted. Participating nodes 12 in the privacy group of t x are further informed that t x is a transaction destined for that privacy group.
Los nodos validadores 13 están habilitados para, una vez recibidos los metadatos de restricción desde el nodo participante 12 proponente, ejecutar, validar, empaquetar y entregar todas las transacciones restringidas a ios nodos participantes 12 pertenecientes al grupo de privacidad. The validator nodes 13 are enabled to, once the restriction metadata has been received from the proposer participant node 12, execute, validate, pack and deliver all the restricted transactions to the participant nodes 12 belonging to the privacy group.
Los nodos participantes 12, que desean realizar una transacción de información restringida dentro del grupo de privacidad, están configurados para desencriptar los bloques encriptado distribuidos desde los nodos validadores 13, mediante la correspondiente clave de privacidad de encriptado correspondiente al grupo de privacidad de la transacción. The participating nodes 12, which wish to carry out a restricted information transaction within the privacy group, are configured to decrypt the encrypted blocks distributed from the validator nodes 13, by means of the corresponding encryption privacy key corresponding to the privacy group of the transaction.
Los nodos validadores 13 están configurados para realizar tareas de administración del grupo de privacidad formado tai como distribuir un conjunto de claves de privacidad de encriptado. Una clave de privacidad del conjunto de claves de privacidad de encriptado es utilizada por los nodos validadores 13 para encriptar las transacciones de información propuestas que tienen que ser encriptadas y marcadas como bloques de datos restringidos antes de ser ensamblados dentro de un bloque y, posterior, distribución a todos los nodos 12 de la red de bloques en cadena; es decir, a los nodos 12 del grupo de privacidad y al resto de nodos de la red de bloques en cadena 11. The validator nodes 13 are configured to perform administration tasks of the formed privacy group such as distributing a set of encryption privacy keys. A privacy key from the set of encryption privacy keys is used by the validator nodes 13 to encrypt the proposed information transactions that have to be encrypted and marked as restricted data blocks before being assembled within a block and, subsequently, distribution to all nodes 12 of the chain block network; that is, to the nodes 12 of the privacy group and to the rest of the nodes of the chain block network 11.
Para que un nodo participante 12 de la red de bloques en cadena pueda realizar una transacción de información restringida con ai menos un determinado nodo participante 12 de la red de bloques en cadena 11 , ambos nodos participantes 12 de la red de bloques en cadena 11 tienen que pertenecer al mismo grupo de privacidad. Todos los nodos 12 de la red de bloques en cadena 11 reciben cada uno de los bloques de datos de la cadena de bloques existente y, sucesivamente, de forma continua la cadena de bloques avanza. So that a participating node 12 of the chain block network can carry out a restricted information transaction with at least one participant node 12 of the chain block network 11, both participating nodes 12 of the chain block network 11 have to belong to the same privacy group. All nodes 12 of the blockchain network 11 receive each of the data blocks from the existing blockchain, and successively the blockchain progresses continuously.
Por lo tanto, todos los nodos 12, 13 de la red bloques en cadena de tienen almacenada la misma copia binaria de la cadena de bloques; a saber, libro de registros distribuido, ledger, inmutable, que Incluye tanto las transacciones públicas como privadas. Los nodos participantes 12 y validadores 13 de la red de bloque en cadena 11 comprenden al menos una interfaz de entrada-salida para realizar comunicaciones entre los distintos nodos 12, 13 de la red de bloques en cadena 11 , ai menos un módulo encriptador-desencriptador, un almacén de grupos de privacidad que comprende al menos un nodo participante 12 y ai menos un conjunto de claves de privacidad de encriptado y un almacén de bloques en cadena; a saber, libro de registros distribuido, ledger. Therefore, all nodes 12, 13 of the blockchain network have the same binary copy of the blockchain stored; namely, distributed ledger, immutable ledger, which includes both public and private transactions. The participating nodes 12 and validators 13 of the chain block network 11 comprise at least one input-output interface to carry out communications between the different nodes 12, 13 of the chain block network 11, at least one encryptor-decryptor module , a privacy group store comprising at least one participating node 12 and at least one set of encryption privacy keys and a chain block store; namely, distributed ledger, ledger.
El almacén de grupos de privacidad de los nodos participantes 12 almacenará sólo los grupos de privacidad en los que sea integrante el nodo participante 12. Por el contrario, el almacén de grupos de privacidad de ios nodos validadores 13 será el resultado del superconjunto de ios grupos de privacidad de cada nodo, o lo que es lo mismo, ios grupos de privacidad que se puedan formar con los n-1 nodos participantes 12 de la red de bloques en cadena 11. The privacy group store of the participating nodes 12 will store only the privacy groups in which the participating node 12 is a member. On the contrary, the privacy group store of the validating nodes 13 will be the result of the superset of ios groups privacy of each node, or what is the same, the privacy groups that can be formed with the n-1 participating nodes 12 of the chain block network 11.

Claims

Reivindicaciones Claims
1. Una disposición de cadenas de bloques configurada para distribuir simultáneamente al menos una transacción pública y/o una transacción restringida, donde ¡a disposición incluye una pluralidad de nodos participantes (12) y una pluralidad de nodos vaiidadores (13) conectados por una red de telecomunicaciones (14); caracterizada por que un nodo participante (12) proponente está configurado para enviar bacía todos ios nodos vaiidadores (13) el contenido de un registro de transacción de información tx, junto con el identificador de un determinado grupo de privacidad preconfigurado. 1. A blockchain arrangement configured to simultaneously distribute at least one public transaction and / or one restricted transaction, where the arrangement includes a plurality of participating nodes (12) and a plurality of validating nodes (13) connected by a network telecommunications (14); characterized in that a participant node (12) proposing is configured to send to all the validating nodes (13) the content of an information transaction record t x , together with the identifier of a certain preconfigured privacy group.
2. Disposición de acuerdo con la reivindicación 1 ; donde el registro de transacción de información tx es encriptado por un módulo encriptador del nodo validador (13) receptor, si los nodos vaiidadores (13) validan y consensúan la transacción de información. 2. Arrangement according to claim 1; where the information transaction record t x is encrypted by an encryption module of the receiving validator node (13), if the validating nodes (13) validate and agree on the information transaction.
3. Disposición de acuerdo con la reivindicación 2; donde el nodo validador (13) receptor está configurado para recubrir la transacción de información tx eneriptada por medio de una nueva transacción de información tx ; de manera que, la transacción de información tx’ es forzada a mantener el mismo identificador hasb que la transacción de información tx. 3. Arrangement according to claim 2; where the receiving validator node (13) is configured to cover the information transaction t x eneripted by means of a new information transaction t x ; so that the information transaction t x 'is forced to keep the same identifier hasb as the information transaction t x .
4. Disposición de acuerdo con la reivindicación 3; donde el nodo validador (13) receptor está configurado para marcar el bloque de datos encriptado con una transacción de información tx restringida; de manera que, sólo los nodos participantes (12) que poseen la clave de privacidad de encriptado están configurados para leer y ejecutar la transacción de información tx restringida. 4. Arrangement according to claim 3; wherein the receiving validator node (13) is configured to mark the encrypted data block with a restricted information transaction t x ; so that only the participating nodes (12) that have the encryption privacy key are configured to read and execute the restricted information transaction t x .
5. Disposición de acuerdo con la reivindicación 4; donde el nodo validador (13) receptor está configurado ensamblar el bloque de datos encriptado y marcado a la cadena de bloques para distribuir la cadena de bloques bacía los nodos participantes (12) en el determinado grupo de privacidad de la transacción de información tx restringida; el determinado grupo de privacidad comparte la clave de privacidad. 5. Arrangement according to claim 4; where the receiving validator node (13) is configured to assemble the encrypted and marked data block to the block chain to distribute the block chain to the participating nodes (12) in the specific privacy group of the restricted information transaction t x ; the particular privacy group shares the privacy key.
6. Disposición de acuerdo con la reivindicación 4; donde el nodo validador (13) receptor está configurado para informar a ios nodos participantes (12) en el determinado grupo de privacidad de la transacción de información tx restringida que la transacción de información tx restringida está destinada al determinado grupo de privacidad. 6. Arrangement according to claim 4; where the receiving validator node (13) is configured to inform the participating nodes (12) in the certain privacy group of the restricted information transaction t x that the restricted information transaction t x is destined for the certain privacy group.
7. Disposición de acuerdo con la reivindicación 6; donde el nodo validador (13) receptor está configurado para distribuir hacia ios nodos participantes (12) la cadena de bloques comprendiendo el bloque de datos con registros encriptados y marcados; donde la cadena de bloques comprenderá de 0 a N transacciones y, al menos, una transacción de información tx restringida. 7. Arrangement according to claim 6; where the receiving validator node (13) is configured to distribute to the participating nodes (12) the chain of blocks comprising the data block with encrypted and marked records; where the blockchain will comprise from 0 to N transactions and at least one restricted information transaction t x .
8 Disposición de acuerdo con la reivindicación 7; donde el nodo vaiidador (13) receptor está configurado para recibir un mensaje de solicitud de ejecución de transacción restringida desde un nodo participante; donde el nodo vaiidador (13) receptor determina los nodos participantes (12) en función de ios integrantes introducidos en un determinado grupo de privacidad preconfigurado. 8 Arrangement according to claim 7; wherein the receiving node (13) is configured to receive a restricted transaction execution request message from a participating node; where the receiving node (13) determines the participating nodes (12) based on the members introduced in a certain pre-configured privacy group.
9. Disposición de acuerdo con la reivindicación 8; donde el mensaje de solicitud de ejecución de la transacción restringida recibido por el nodo vaiidador (13) receptor, comprende además de los datos propios de la transacción propuesta por el nodo participante proponente (12) ios metadatos relativos al contexto de privacidad para el que se ejecuta la transacción restringida. 9. Arrangement according to claim 8; where the message requesting the execution of the restricted transaction received by the receiving node (13) includes, in addition to the data of the transaction proposed by the proposing participant node (12), the metadata related to the privacy context for which it is executes the restricted transaction.
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CA3103884A CA3103884A1 (en) 2019-07-18 2019-07-18 Arrangement of blockchains with a restricted transaction
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114760157A (en) * 2022-06-16 2022-07-15 天津市城市规划设计研究总院有限公司 Method and system for verifying validity of block link nodes in urban planning field

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113542413B (en) * 2021-07-16 2024-01-05 北京数牍科技有限公司 Manageable privacy computing method, system and computer equipment based on trusted memory card
CN113868695B (en) * 2021-08-20 2024-06-25 河南大学 Block chain-based trusted privacy protection method in crowd-sourced data aggregation
US11968307B2 (en) * 2021-09-27 2024-04-23 International Bisuness Machines Corporation Private ledger partitions in blockchain networks

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180183768A1 (en) * 2016-04-01 2018-06-28 Jpmorgan Chase Bank, N.A. Systems and methods for privacy in distributed ledger transactions
WO2018175504A1 (en) * 2017-03-20 2018-09-27 Wasserman Steven Victor Blockchain digital currency: systems and methods for use in enterprise blockchain banking
CN109409888A (en) * 2018-11-13 2019-03-01 上海物融智能科技有限公司 Transaction processing method, publicly-owned node, transaction interdependent node and publicly-owned block chain
CN109472601A (en) * 2018-11-21 2019-03-15 北京蓝石环球区块链科技有限公司 The block chain framework of privacy transaction can be supervised
WO2019072299A2 (en) * 2018-12-19 2019-04-18 Alibaba Group Holding Limited Data isolation in a blockchain network
CN110020549A (en) * 2019-02-19 2019-07-16 阿里巴巴集团控股有限公司 Method, node and the storage medium of secret protection are realized in block chain

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9992028B2 (en) * 2015-11-26 2018-06-05 International Business Machines Corporation System, method, and computer program product for privacy-preserving transaction validation mechanisms for smart contracts that are included in a ledger
US11436593B2 (en) 2016-03-31 2022-09-06 Bitflyer Blockchain, Inc. Transaction processing device, transaction processing method, and program for same
US10567168B2 (en) 2017-11-16 2020-02-18 International Business Machines Corporation Blockchain transaction privacy enhancement through broadcast encryption
CA3041156A1 (en) 2018-11-07 2019-04-18 Alibaba Group Holding Limited Recovering encrypted transaction information in blockchain confidential transactions
WO2019120326A2 (en) 2019-03-29 2019-06-27 Alibaba Group Holding Limited Managing sensitive data elements in a blockchain network

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180183768A1 (en) * 2016-04-01 2018-06-28 Jpmorgan Chase Bank, N.A. Systems and methods for privacy in distributed ledger transactions
WO2018175504A1 (en) * 2017-03-20 2018-09-27 Wasserman Steven Victor Blockchain digital currency: systems and methods for use in enterprise blockchain banking
CN109409888A (en) * 2018-11-13 2019-03-01 上海物融智能科技有限公司 Transaction processing method, publicly-owned node, transaction interdependent node and publicly-owned block chain
CN109472601A (en) * 2018-11-21 2019-03-15 北京蓝石环球区块链科技有限公司 The block chain framework of privacy transaction can be supervised
WO2019072299A2 (en) * 2018-12-19 2019-04-18 Alibaba Group Holding Limited Data isolation in a blockchain network
CN110020549A (en) * 2019-02-19 2019-07-16 阿里巴巴集团控股有限公司 Method, node and the storage medium of secret protection are realized in block chain

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4036744A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114760157A (en) * 2022-06-16 2022-07-15 天津市城市规划设计研究总院有限公司 Method and system for verifying validity of block link nodes in urban planning field
CN114760157B (en) * 2022-06-16 2022-09-16 天津市城市规划设计研究总院有限公司 Method and system for verifying validity of block chain node in urban planning field

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